Likely Israel is planning to gain control of the border with Egypt to cut off anything coming in that way, and either annexing that border strip outright or maintaining control of the border will be part of the peace terms.

Irrespective of stopping the movement of new arms and missiles into Gaza, more hawkish israelis would probably salivate over being able to shut down all trade into Gaza every time they shoot off missiles, especially since every time they do it weakens confidence in being able to trade into Gaza, raising the costs for anyone trying to import anything into Gaza, and lowering the sell value of any goods made in Gaza.